Compact / High-Ratio Planetary Gearbox Patent Snapshot
The compact and high-ratio planetary gearbox space is a small, highly concentrated field dominated by wind-energy and drivetrain specialists, with the top five filers accounting for 73% of activity among the hundred largest filers. Filing activity has plateaued near its 2023 peak, signalling a mature technology base with selective pockets of adjacent opportunity.
A tightly held field led by wind-power and drivetrain specialists
Yuanjian Wind Power (Jiangyin / Envision Energy) and General Electric share the top rank, each holding 6 patent records, followed by Gamesa Innovation & Technology with 3 patent records. The field is concentrated at the apex: two players alone account for a visible share of all ranked activity.
The top five filers—Yuanjian/Envision, General Electric, Gamesa, Hornet AcquisitionCo, and ZF Friedrichshafen—collectively represent 73% of the ranked applicants visible in this query’ combined totals. The tier below them (Fairfield Manufacturing, Siemens Gamesa Renewable Energy Innovation & Technology, Deere & Co, and Vervent) each hold only 1–2 patent records, indicating a pronounced gap between leaders and the rest of the field.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | YUANJIAN WIND POWER JIANGYINENVISION ENERGY CO LTD | 6 | |
| 2 | General Electric Co | 6 | |
| 3 | GAMESA INNOVATION & TECH SL | 3 | |
| 4 | Hornet AcquisitionCo LLC | 2 | |
| 5 | ZF Friedrichshafen AG | 2 | |
| 6 | Fairfield Manufacturing Co., Inc. | 2 | |
| 7 | SIEMENS GAMESA RENEWABLE ENERGY INNOVATION & TECH | 2 | |
| 8 | DEERE & CO | 2 | |
| 9 | Vervent | 1 |
The leaders’ positions reflect deep wind-turbine drivetrain expertise; both Yuanjian/Envision and General Electric file primarily under gearing and wind-motor classes, suggesting that planetary gearbox innovation in this corpus is tightly coupled to large-scale renewable energy applications rather than being a broadly contested general-purpose technology.
Patent publications from approximately the last 18–24 months are likely under-counted due to standard publication lag; the apparent absence of filings in 2024 and 2026 should not be read as a true decline. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity plateaued near a 2023 peak; gearing dominates the technology mix
The annual filing trend and technology composition charts together reveal a mature, application-specific technology: volume has not shown sustained growth, and the IPC mix is anchored by core gearing classes with secondary clusters in wind-turbine and lubrication systems.
Annual filing trend
Filings were modest and irregular from 2017 to 2022, spiking to 5 records in 2023 before falling back. This is the field’s highest annual volume in the window. The 2024–2026 period shows near-zero activity, but publication lag makes this unreliable as a trend signal; the field is best described as plateaued near its 2023 peak rather than declining.
↗ Hover for values · click a bar to ask EurekaTechnology composition
F16H (Gearing & transmissions) is the visible class with 26 patent records, reflecting the core mechanical innovation. F03D (Wind motors / wind turbines) is a strong secondary cluster with 11 records, confirming the wind-energy application emphasis. F16N (Lubrication systems), B64D (Aircraft equipment), and F16D (Clutches & brakes) each contribute smaller but distinct clusters, pointing to adjacent application domains that remain sparsely covered.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Planetary gearbox with integral service brake
A planetary gearbox with substantial speed reduction includes a stationary spindle, an integral service brake, and a parking brake. The integral service brake resides radially outwardly with respect to the parking brake in a stacked arrangement such that axial space is conserved yielding an axially short and compact gearbox. An oil passageway extends… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Planetary gearbox with integral service brake | 26 |
| 2 | Planetary gearbox with integral service brake | 17 |
| 3 | Getriebe | 9 |
| 4 | Wind turbine | 7 |
| 5 | Modular gear unit for a wind turbine | 5 |
| 6 | Gear assembly damper arrangement | 4 |
| 7 | Modular gear unit for a wind turbine | 4 |
| 8 | Gearbox | 4 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
Yuanjian Wind Power / Envision Energy
Holding 6 patent records, Yuanjian/Envision entered the ranked corpus as a new entrant (marked as a new entrant in momentum data), suggesting a recent and concentrated filing push rather than a long-standing portfolio. Their technology emphasis spans F03D 80 (wind motor systems), F16H 57 (gearing arrangement), and F16N 13 (lubrication systems), indicating an integrated approach to wind-turbine drivetrain design that bundles gearbox, lubrication, and structural considerations in a single filing cluster.
patent records: 6General Electric
Also holding 6 patent records, General Electric’s portfolio focuses tightly on core gearing sub-classes: F16H 1 (fundamental gear types), F16H 55 (gear teeth and gear geometry), and F16H 57 (gearing arrangement and housings). This contrasts with Yuanjian/Envision’s broader system-level emphasis and suggests GE’s filings are directed at foundational mechanical design rather than full drivetrain integration. No momentum shift is indicated for GE in the available evidence.
patent records: 6Frequently asked questions
The evidence covers 17 patent families in scope for this topic. The corpus is small, which means each filing carries significant weight in the directional assignee snapshot.
Yuanjian Wind Power (Jiangyin / Envision Energy) and General Electric are tied at 6 patent records each, making them joint leaders. Gamesa Innovation & Technology holds 3 patent records. All other identified filers hold 2 or fewer records.
The field is at a maturity stage, with annual filings having plateaued near their 2023 peak. The 2023 spike to 5 records was the highest annual count in the observed window. The apparent drop in 2024–2026 is likely due to publication lag and should not be read as a confirmed decline.
The United States leads with 10 patent records, followed by Europe (EPO) with 6, Canada with 3, India with 2, and WIPO (PCT) with 2. Australia, Germany, and Denmark each hold 1 record. Protection in Asia-Pacific markets beyond Australia is limited in this corpus.
Beyond the visible F03D (wind turbines) cluster with 11 records, the corpus includes B64D (Aircraft equipment) with 4 records, F16D (Clutches & brakes) with 4 records, B60K (Vehicle propulsion & drive) with 2 records, B66D (Winches & capstans) with 2 records, and single records in gas-turbine plants (F02C) and electric motors and generators (H02K).
Collaboration activity in this corpus is minimal. The only co-filing relationships identified involve ZF Friedrichshafen AG paired with named individual inventors Siegfried Stutzle and Helmut Eymuller, each with a single co-filing. No cross-company or industry-academic consortia are evident in the available evidence.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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